﻿using System;
using System.Text.RegularExpressions;

/*
    2013.12.14
 * 
 *      1.创建一般验证者类
 *      2.提供检测邮箱，身份证，电话号码的检查 - 主要使用正则表达式来做
 */

namespace SharpCommon.Utility
{
    public static class GenerallyValidater
    {
        public static bool IsEmail(this string value)
        {
            if (string.IsNullOrEmpty(value)) return false;
            return Regex.IsMatch(value, @"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$", RegexOptions.IgnoreCase);
        }

        public static bool IsIdentityCard(this string value)
        {
            if (value.Length == 18)
            {
                return IsIdentityCard18(value);
            }
            return value.Length == 15 && IsIdentityCard15(value);
        }

        private static bool IsIdentityCard18(string value)
        {
            long n = 0;
            if (long.TryParse(value.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(value.Replace('x', '0').Replace('X', '0'), out n) == false)
            {
                return false;//数字验证
            }
            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(value.Remove(2), StringComparison.Ordinal) != -1)
            {
                string birth = value.Substring(6, 8).Insert(6, "-").Insert(4, "-");
                DateTime time = new DateTime();
                if (DateTime.TryParse(birth, out time) == false)
                {
                    return false; //生日验证
                }
                string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
                string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
                char[] Ai = value.Remove(17).ToCharArray();
                int sum = 0;
                for (int i = 0; i < 17; i++)
                {
                    sum += int.Parse(Wi[i])*int.Parse(Ai[i].ToString());
                }
                int y = -1;
                Math.DivRem(sum, 11, out y);
                if (arrVarifyCode[y] != value.Substring(17, 1).ToLower())
                {
                    return false; //校验码验证
                }
                return true; //符合GB11643-1999标准
            }
            return false;//省份验证
        }

        private static bool IsIdentityCard15(string value)
        {
            long n;
            if (long.TryParse(value, out n) == false || n < Math.Pow(10, 14))
            {
                return false;//数字验证
            }
            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(value.Remove(2), StringComparison.Ordinal) != -1)
            {
                string birth = value.Substring(6, 6).Insert(4, "-").Insert(2, "-");
                DateTime time = new DateTime();
                if (DateTime.TryParse(birth, out time) == false)
                {
                    return false; //生日验证
                }
                return true; //符合15位身份证标准
            }
            return false;//省份验证
        }

        public static bool IsPhoneNumber(this string value)
        {
            return Regex.IsMatch(value, @"^1[358]\d{9}$", RegexOptions.IgnoreCase);
        }

        public static bool IsPostCode(this string value)
        {
            return Regex.IsMatch(value, @"^\d{6}$", RegexOptions.IgnoreCase);
        }

        public static bool IsChineseHomeTelephone(this string value)
        {
            return Regex.IsMatch(value, @"^\d{3,4}-?\d{6,8}$", RegexOptions.IgnoreCase);
        }
    }
}
